Carrier Frequency: C6-01 To C6-03; Setting The Carrier Frequency - YASKAWA VARISPEED-616G5 Instruction Manual

Advanced Operation
7.5.2 Tuning Constants: C
7

Carrier Frequency: C6-01 to C6-03

J
The carrier frequency characteristics differ according to the control method.
D
V/f control and V/f with PG feedback control: Carrier frequency variable setting possible.
•
Open-loop vector control and flux vector control: Constant frequency (The carrier frequency up-
•
per limit only is set.)
The carrier frequency does not normally need to be adjusted, but make adjustments in the following
D
cases:
If the wiring distance between the Inverter and the motor is long, lower the carrier frequency.
•
Wiring Distance
Carrier Frequency
If there are great irregularities in speed or torque, lower the carrier frequency.
•
User User
Name
Constant
Number
Carrier frequency
C6-01
upper limit
Carrier frequency
C6-02
lower limit
Carrier frequency
C6-03
proportional gain
* 1. The setting range for the carrier frequency upper limit is as follows for the control methods:
S V/f control (with or without PG): 0.4 to 15.0
S Vector control (open-loop or flux): 2.0 to 15.0
* 2. The setting range and the factory setting vary according to the Inverter capacity. The table
shows a value of 200 V class, 0.4 kW. (See page 8 - 47.)
In the vector control modes, the carrier frequency is determined by the carrier frequency upper limit
D
(constant C6-01). In the V/f control modes (both with and without PG), the carrier frequency can be
changed in response to the output frequency by setting the carrier frequency lower limit (constant
C6-02) and the carrier frequency proportional gain (constant C6-03).
Carrier frequency
C6-01
C6-02
0
Fig 7.29

Setting the Carrier Frequency

To make the carrier frequency constant, either set the same value for constants C6-01 and C6-02 or
D
set the carrier frequency proportional gain (constant C6-03) to "0" (i.e., fix at upper limit value). The
following settings will generate a constant setting fault (OPE11):
Carrier frequency upper limit (C6-01) > 5.0 kHz and carrier frequency lower limit (C6-02) ≤ 5.0 kHz
•
Carrier frequency proportional gain (C6-03) > 6 and (C6-01) < C6-02)
•
If the lower limit is set higher than the upper limit, the lower limit will be disregarded and carrier frequency will
D
be fixed at the upper limit.
50 m max.
15 kHz max.
Change g
during during Setting Setting Unit Factory
Opera- Range
tion
*1
2.0 to 15.0 kHz
×
0.4 to 15.0 kHz
×
Mul-
00 to 99
×
tiple
Output frequency
x (C6-03) x K
E1-04
(Maximum output frequency)
7 - 56
100 m max. Over 100 m
10 kHz 5 kHz max.
Valid Access Levels
Factory
Open
V/f V/f with
Setting
Loop
Control PG
Vector
*2
B B B
15.0
*2
A A
15.0
×
A A
00
×
The coefficient "K" varies depending
on the carrier frequency upper limit, as
described below:
D C6-01 ≥ 10.0kHz : K = 3
D 10.0kHz > C6-01 ≥ 5.0kHz : K = 2
D 5.0kHz > C6-01 : K = 1
Output frequency
Flux
Vector
B
×
×